Machine for stretching hanks or skeins



Aug. 16 1927;

W. GERBER MACHINE FOR STRETC HING HANKS 0R SKEINS Filed March 28. 1927 [12 van Z02" Patented Aug. 16, 1927.

UNITED, STATES PATENT OFFICE.

WILHELM GERBER, OF KREI'EIZD, GERMANY.

MACHINE FOB S TRETCHING HANKS R SKEINS.

Application filed March 28, 1927, Serial No. 178,904, and in Germany October 30, 1926.

This invention relates to hank or skein stretching machines.

Machines for stretching real silk and cotton already known in the art which are used for smoothing and stretching the threads in hanks or skiens operate by the hank or skein being placed over two horizontal rollers, the

description cannot be used for artificial silk, because the silk is moist when. it passes over the machine and in this state it is easily injured. In conse quence of the constant revolution of the upper roller during the up and down movement of the lower roller while the threads are at times slack and; at other times taut, the threads are relatively displaced, caus ing variations in the sizes of the loops with conconsequent uneven tensions and rubbing ,s be;

tact of the threads, so that the three come torn or otherwise injured,

I have discovered hat t s j t on may be avoided by the. provision-of a-machine whereby both rollers areheld against revolving while the hank is being put on and removed, and both rollers also held against revolving during the up and down movement of the lower rollers, and by causing the rollers to-revolve only when 'the hank lies stretched or taut between the rollers. It is moreover desirable that the extent of the swinging movement of the lower beater roller may be varied, as artificial silk is reeled in different lengths by different factories, and because-it isnecessary to beat one kind of silk more strongly than another. a The invention referred to here possesses all the qualities requisite for a machine for stretching of the yarn of all artificial silk.

without injury to the silk In the accompanying drawing showing by way of exemplification arr-embodiment of the invention, K V M V Figure 1 is aside elevation of a duplex by an adjustable i. e., do not revolve.

type of machine'constructed in accordance with the invention.

Figures 2 and 3 are sections on lines 2+2 and '33 of Figure 1.

,A motor 1 drives, by means of admin 2, a shaft 3 ateach end of which there is arranged a double friction drive gear having diametrically disposed gear segments 4, thewedge-shaped circumferential faces of which engage the grooved friction pulleys 5 of corresponding cross section fixed I on" the horizontally arranged driving rollers '6. These rollers revolve intermittently whenever the segments 4 engage the pulleys 5, namely, twice on each revolutionof shaft 3.. The shaft 7 which is constantly driven by the motor 1 carries at each end a cam 8 which on different portions of its revolution lifts and then allows to drop the vibratory lever 9 fulcrumed on an eccentric gudgeon 24 and carrying a roller 10 to ride upon the cam. The lever carries the freely revolving lower beating roller 11 which rises and falls with said lever, which is thus movable toward and from the companion driving roller The force with which the roller 11 falls can be regulated by means of an adjustable balance weight 12 mounted on an arm 22 carried by the lever 9. The fall of lever 9 is cushioned and further regulated V buffer spring 13. V The artificial silk hanks are placed on the driving rollers 6 and beater rollers 11 and stretched and smoothed by the up anddow'n movement of the rollers '11. The cams 8 and the segments 4 are in such aposition with respect to eachother that during the up and down movement of the rollers 11 the' rollers 6 are out of gear with the seg ments t and consequentl remain stationary, or this purpose the gears-4 are mounted loosely on shaft 3 and locking wedges or devices 25am provided for coupling them to or uncoupling them from said shaft. 7 7

A friction bevel gear-14 can be moved inward or outward by meansof a hand lever 23. When-moved inwardtlie gear 14- engages a conical roller 15 mounted on the lever? sothat it lifts the lever sufficiently to allow thecam 8 to pass freely under the roller 10,'so that the roller 11 will be held elevated, and frombeing vibrated by the cam. This is the position'of-rollers 11 'when the'hanks are placed on the rollerse and 11 and removed from them, at which time the rollers 6 are caused to remain idle by operating the locking devices to uncouple gears t from shaft 3. It will be seen that the sets of devices at opposite sides of the duplex machine can work independently or" one another.

The operation is as follows: After the hank has been placed on the idle rolls 6 and 11 the gear 4 is coupled to the constantly revolving shaft 3, the control-lever 23 is drawn out to tree roller 11 for operation and the machine now works so that between succeeding blows of the lower roller the upper roller revolves to shift the hank about the rollers during the time when the hank is stretched taut between the rollers. The hank is thus shifted only when the roller 11 is depressed and the'roller 6 is rotated, thus preventing any relative displacements of the threads of the hank and any injury thereto.

In order to vary the range of vibratory movement of roller 11 the eccentric gudgeon 24: on which the lever 9 is mounted is turned to vary the height of the pivotal point of the lever, as will be readily understood. By this means the spacing between the levers maybe changed 'for different sizes of hanks or to vary the beating and stretching motion of roller 9 for any particular size of hank.

It is, of course obvious, that the invention may be embodied in a single type of machine, i. e., a machine employing but a single set of working parts, or in a duplex machine, as shown, or in a machine having more than two sets of working parts, as de sired.

It should be noted that the invention as herein shown and described by way of illustration, may be modified and changed in various respects without deviating from the spirit of the invention, as expressed in the appended claims.

Having thus fully described my invention, I claim I 1. In a hank stretching machine, a rotary driving roller, a rotary and vibratory beating roller, and means for periodically rotating the driving roller when the beating roller is not vibrating and is at the limit of its distance from the driving roller, and for vibrating the vibrating roller when the driving roller is not rotating.

2. In a hank stretching machine, a rotary driving roller, a rotary and vibratory heating roller, means for periodically rotating the driving roller, and means for periodically vibrating the beatingroller, each of said means operating at a time period when the other is at rest.

3. In a hank stretching machine, a rotatable driving roller, a rotatable and pivotally mounted beating roller vibratory on its pivot toward and from the driving roller,

time pei'iods between time periods of action of the other, and means for shifting the pivot point of the beating roller so as to dispose said roller at a greater or less distance from the driving roller.

5. In a hank stretching machine, a rotatable driving roller, a rotatable and'vibratory beatingroller pivotally mounted to swing toward and from the driving roller, rotatable driving means for the driving roller operative on each rotation to twice impart a rotary driving motion to the driving roller, and means for vibrating the beating roller between the driving movements of said driving means and while both rollers are not rotating.

6. In a hank stretching machine, a rotary driving roller, a rotatable and vibratory beating roller, a. drive gear having a pair of driving elements operative on each halt rotation of said gear to transmit driving motion to the driving roller, and means for vibrating the vibrating roller at periods between the elements.

7. In a hank stretching machine, a rotatable driving roller, a rotatable and vibratory beating roller pivotally mounted for swinging movements toward and from said driv ing roller, means for periodically driving the driving roller means for vibrating the beating roller between intervals of operation of said driving means, and means for swing ing said heating roller on its pivot and rendering it inoperative with respect to its vibrating means.

8. In a hank stretching machine, a, ro-' tatable driving roller, a rotatable and vibratory beating roller pivotaly mounted for swinging movements toward and from the driving roller, means for periodically driving the driving roller, means for periodically vibrating thebeating roller betweenintervals of action of the first-named means, and means for rendering the driving means of the driving roller inoperative for a driving action thereon. V p g 9. In a hank stretching machine, a rotatable driving roller, a rotatable and vibratory beating roller pivotally mounted for swinging movements toward and from said drivperiods of action of said driving ing roller,means for periodically driving the ing the beating roller between intervals of operation of said driving means, and an eccentric support for the pivot of the beating roller adjustable to vary the position of said pivot and of said beating roller with relation to the driving roller.

10. In a hank stretching machine, a rotatable driving roller, a rotatable and vibratory beating roller pivotall mounted for swinging movements towar and from said driving roller, means for periodically driving the driving roller, means for periodically vibrating the beating roller between intervals of action of said driving roller driving means, and means for shifting said beating roller toward the driving roller and out of engagement with its vibrating means.

11. In a hank stretching machine, a rotatable driving roller, a rotatable and vibratory beating roller pivotally mounted for swinging movements toward and from the driving roller, means for periodically driving the driving roller, means for periodical- 1y vibrating the vibrating roller between periods of operation of said driving means, means for varying the position of the pivot of the beating roller and the position of said beating roller with respect to the driving roller, and means for shifting the beating roller on its pivot toward the driving roller and out of coaction with its vibrating means.

and sets of hank stretching devices on opposite sides of said frame, each including a rotatable driving roller and arotatable and vibratory beating roller pivoted to swing toward and from the driving roller, driving means for periodically actuating the driving roller, means for periodically vibrating the beating roller between intervals of operation ofthe driving means, and means upon the frame providing a common source of power for the driving and vibratory means of the two sets of devices.

In testimony whereof I aflix my signature.

WILHELM GERBER.

12. In a hank stretching machine, a frame, 

